Jay earns S amount per day for working in a company. His total expenses per day is equal to the amount E. Write an expression to show how much he earned per day in a month. Suppose he is working for 20 days per month.
- Each day, Jay earns a profit of S - E.
- For one month (30 days), he earns 30(S - E)
- For 20 working days in a month, he earns 20(S - E)